Original title: Case study of galloping in a low-voltage insulated bundled overhead line
Authors: Hračov, Stanislav ; Macháček, Michael
Document type: Papers
Conference/Event: Computational mechanics 2024 /39./., Srní (CZ), 20241104
Year: 2024
Language: eng
Abstract: An analysis of the susceptibility of a bundled overhead line to galloping is presented, focusing on a case study of an aerial cable composed of four conductors insulated with polyethylene, used in low-voltage power lines. The susceptibility to instability is analyzed for the cable both with and without simulated icing, as observed on similar real conductors. In the first case, the proneness to galloping was ruled out based on the results of a CFD simulation and the Den Hartog criterion. In the second case, the potential for galloping was confirmed. The critical wind velocity for the ice-covered cable was calculated using quasi-steady theory. Finally, the amplitudes of limit cycle oscillation for supercritical wind speeds were estimated through a simplified numerical analysis. Numerical simulations were also carried out for several different angles of attack—i.e., various rotational angles of the line's cross-section relative to the wind direction—particularly close to the critical angles, to determine and analyze the maximum possible dynamic response.
Keywords: galloping; ice accreation; nonlinear system; power line; wind
Project no.: GA24-13061S (CEP)
Funding provider: GA ČR
Host item entry: Computational mechanics 2024. Proceedings of computational mechanics 2024, ISBN 978-80-261-1249-5

Institution: Institute of Theoretical and Applied Mechanics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: https://hdl.handle.net/11104/0357807

Permalink: http://www.nusl.cz/ntk/nusl-668239


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Research > Institutes ASCR > Institute of Theoretical and Applied Mechanics
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